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. 2019 Sep 16;13(2):206–212. doi: 10.1055/s-0039-1694305

Fig. 4.

Fig. 4

Optical microscopy pictures showing the cultures stained with alizarin red. ( A ) Control cultured in a medium for 21 days. ( B ) Differentiation of adipose-derived mesenchymal stem cells as shown by positive alizarin red staining in osteogenic medium for 21 days (inverted microscope at 200× magnification).